Portal Defense DLC Missions: How to Earn Gold Medals

To earn Gold medals in Portal Defense DLC missions, build a dense cluster of upgraded towers at central chokepoints rather than spreading low-tier structures across the map. Clear waves quickly by establishing an initial baseline defense, shifting all gold into upgrading core turrets to Tier 2 and Tier 3, and adjusting your build to match incoming spawn indicators.

Tower Placement and Pathing Optimization

Maximizing tower damage uptime is essential for reaching the score threshold required for a Gold medal. Position your primary damage towers inside winding loops or at converging chokepoints so they maintain continuous fire on enemies throughout their pathing.

• Loop Placement: On winding maps like Onslaught and Forge, place high-damage turrets inside the center of path loops. This ensures towers continue firing on targets for their entire travel time instead of idling when enemies step out of range.
• Chokepoint Funneling: On maps with tight terrain like Infiltration, locate your defense where enemy routes narrow. Funneling targets into a single direct line forces your turrets to focus fire on one unit at a time, eliminating enemies faster.
• Layered Defense: Build slowing or debuffing structures at the entrance of your primary kill zone, placing high-damage turrets directly behind them to trap units inside sustained fire.

Resource Spending and Upgrade Priorities

Spreading gold across many low-level towers reduces total DPS and slows clear times. Manage your economy by following a strict spending sequence:

1. Establish a Baseline: Spend initial gold on a minimal setup that handles the first few waves without leaking.
2. Focus on Upgrades: Stop building new towers and invest entirely in upgrading your existing central structures to maximum tier.

In maps featuring heavy armor like Entanglement, high-health enemies require the increased fire rate and heavy damage per shot provided by Tier 2 and Tier 3 upgrades. Upgrading your core cluster gives a higher damage return per unit of gold than adding new Tier 1 towers.

Countering Enemy Wave Compositions

Check the spawn indicators before each wave to adjust your defensive focus before enemies arrive on the field:

Adapting your tower upgrades to match upcoming wave compositions prevents late-game leaks and keeps your overall damage output high enough to secure the Gold medal ranking.